Tool for treating stone, concrete, and other materials.



'APPLICATION FILED MAR. I3. 1915. IIEIIIiwEn JUNE 3,` I9Is.\

APfIIenI-,ed Apr. 24, 1917;

2 SHEETS-SHEET I.

WITNESSES r/I TTORN E YS IIIr .wams mens ca Hammam wAsIIINQ-Ifm. u c.

1. o. BERG. TOOL FOR TREATING STONE, CONCRETE, ANO OTHER MATERIALS.

APPLICATION FILED MAR. 13| T915. RENEWED IUE 3.1916.

Patented Apr. 24,1917.

NI/ENTUR John 4O. Berg S EL 8 S M U W ',ZAB)71 A ITam/51's .y or NEWYORK, N. Y.,

Application filed March 13, 19175, Serial No. 14,101.

To all wzomc't'mag/ concern.' Be it known that I, Jol-1N O.` BERG, acitizen of the' United States, anda resident of the city of NewYork,borough `of Manhattan, in the countyk and State of New York, haveinvented a new' and useful Tool for Treating Stone, Concrete, and otherMaterials, of which the following is a full, clear, and eXactdescription. This invention relates to tools for surfaclng stone,concrete `and other similar Inaterials, and is' herein be understood,however, ythat the vinvention is not restricted to the yembodiment anduses herein described and illustrated, .and that many features` of theinvention areof general applicability in the art to which it relates. Anobject of the invention istoprovide a surfacing :tool for the lpurposesherein set forth which-'will produce a better finished surface uponconcrete, artificial stone, etc., than has been obtainable withk themethods and tools heretofore employed and which will have capacity for agreater amount of finished work in a given time. More particularly theinvention aims to provide a surfacing tool which will effect theresurfacing operation by a chiseling or chipping action -asdistinguished from a grinding action.

Another object of the invention is to provide a tool for the purposesherein set forth which can be operated successfully by comparativelyunskilled labor `and which will require little attention from theoperator, either to keep its cutting parts sharp or to keep the tool asa whole in proper operative condition. I

An important feature of the invention is the novel cutter employed tosecure` the chiseling or chipping action" hereinabove referred to,'thiscutter being so constructed and arranged and so operated that itscutting edges are maintained in condition. by thel action of the work'upon the cutter in the cutting operation. Another important feature ofthe invention is the provision of parts coperating with the cutter bothto define the field of its operation and by action upon the surface tobe treated to facilitate such'operation.

Other important features of thefinven'- Specification of Letters Patent.

shown as embodied a power-operated vrotary surfacer. It willl vgages theperiphery of the plate ,cesses l0a in the spindles 10.' the propercutting Renewed `Tune 3, 1916. Serial N o. 101,645. f

tion are the novel means forsupporting and guiding the cutters, thenovel means fory 4driving the cutter ycarrier, and the novel means forsecurmg proper lubrication of the driving elements and the protection ofthese elements from dirt, grit, and other foreign substances. Stillother objects and important features of the invention will appear fromthe following description and claims when considered in connection withthe accompanying drawings, in which` c `Figure l is a sectional sideelevation of the invention;

Fig. 2 is an inverted plan view of Fig. l, parts being broken away toillustrate the construction partially in section;

Fig. 3 is a sectional view of the plate and showing how the spindles andmounted relatively thereto;

Fig. 4 is a fragmentary sectional view showing how the rollers aremounted;

Fig. 5 is a view showing one of the disks, and

Fig. k6 is an enlarged fragmentary view illustrating the shape of theteeth on the disks.

By referring to the drawings it will be Seen that a casing 5 is shaft 6rotatably and slidably mounted therein, and to which is secured a plate7constitutinga part of the cutter carrier now to be described. In thisplate 7 there are openings 8 for receiving the disks or rotary cutters9, these disks or cutters 9 being mounted on'the spindles 10, which aredisposed in the bearing grooves ll in the plate 7, the spindles 10 beingheld in the said which is secured screws 13. The an outer flange 12awhich en- 7 and an inner flange 12b 'which' is disposed at the shoulder7a in the plate 7 and also in the rerotation plate 12 has of thespindles l0 cutters 9 are disposed.r The plate 7 is held on the shaft 6by a nut 6a and the spindle lOc is enlarged to engage the nut 6at andprevent its rotation relatively to the plate 7. The disks or cutters 9have teeth l5 projecting from their peripheries, these teeth l5 beingdisposed at angles to the radii of the disks are A provided having. a

being preventedl by this means. The plate l2valso is provided withopenings 12 through which the disks or disks or cutters 9 so that whensaid disks or cutters rotate against the surface of the stone to betreated with the rotation of the plate 7 the teeth 15 will strike thesaid surface of the stone with great rapidity to treat the stone asdesired. It is understood that the teeth 15 may be disposed at anydesired angle relatively to the radii of the disks or cutters 9 and thatthey may be of any desired size and may be spaced apart as may be bestto accomplish the results desired with the particular stone which isbeing treated.

Mounted on the spindles 10 at the sides of and between the disks orcutters 9 there are washers 10b, the washers 1()b at the outer sides ofthe cutters 9 being of substantially the same diameter as the cutters,these washers 10b holding the cutters in position relatively to eachother and serving to limit the action of the teeth 15.

The casing 5 has ears orifices in which mesh screws 17 having heads 18for engaging the surface of the sto-ne which is being treated toposition the teeth 15 on the disks or cutters 9 as may be desiredrelatively to the said surface. The casing 5 also has additional ears 19in which mesh screws 20 having brackets 21 journaled at their lowerends, these brackets having flanges 22 between which are disposedrollers 23, these rollers 23 being mounted on the bent terminals 24 ofthe rods 25, the terminals 24 being journaled in bearings in the flanges22. rlhe rods 25 are inovably disposed in the sleeves 26, rods 27 alsobeing disposed in the said sleeves 26, these rods 27 having bentterminals 28 articulated to the studs 29. r1`he rollers 23 as well asthe heads 18 serve to gage the position of the teeth 15 of the disks orcutters 9 with respect to the surface of the stone which is beingtreated. rIhe rollers 23 are permitted to rotate under the guidance ofthe operator. The brackets 21 are journaled on vertical `axes to turnrelatively to the screws 20, as has been described, so that the rollersmay at all times be held parallel with each other when the screws 2O arerotated for adjustment. The

16 with threaded screws 17 and the screws 20 are held in adjustedposition by the locking screws 30 which bind the said screws 17 and 20between the ears 16 and 19 and the straps 16n and 19 connected therewitThe studs 29 `are secured to the arm 32, there being a second arm 33which extends from the casingv 5 above the arm 32, these arms 32 and 33being joined by the handle 34.

The shaft 6 is slidably mounted in the gear 40 which is journaled in abearing 35 which rests in an opening 36 in a member 5a of the casing 5,the casing member 5EL having an inner thread 37 which meshes with anouter thread 38 on the casing 5. The shaft 6 above the bearing 35 isprovided with a key 39 which secures it for rotating with the gear wheel40 mounted on the shaft 6. rThis gear wheel 4() normally meshes with agear wheel 41 integral with a hollow shaft 42 journaled in bearings 43in a plug 44. This plug has an outer thread 45 which normally mesheswith the thread opening 46 in the casing member 5a. The hollow shaft 42is rotated by a shaft 47 which screws into the said hollow shaft. liththis arrangement the shaft 6 is rotated by a shaft which is disposed atright angles to it.

Then it is desired to rotate the shaft 6 by a shaft disposed coaxiallytherewith the plug 48 is unscrewed and the plug 44 is screwed into thethreaded orifice 49, the hollow shaft 42 having a groove 50 to receivethe key 39 so that the shaft 6 will rotate with the shaft 47. rThe plug48 is then screwed into the threaded opening 46.

ln the casing 5 there is an inner thread 60 in which meshes the outerthread 61 on the bearing 62. rlhis bearing 62 has a shoulder 63 againstwhich is disposed the ball bearing 64 which serves to hold the shaft inposition. The bearing 62 has a sleeve 65 with outer teeth 66 with whichmeshes the worm`67 journaled in bearings in the casing 5. rlhe angularend 67L of the worm shaft projects beyond the casing, so that it may beengaged by the wrench to turn the worm and with it the bearing 62.Against the ball bearing 64 there is disposed a collar 68, the collarhaving a flange 69 against which abuts the inner end 70 of the spring71, being disposed between the collar 68 and the sleeve 65. The outerend 72 of the spring 71 presses against the end 73 of the ball bearing74, the other end 75 of the ball bearing 74 pressing against the stop76, the 105 collar 77 having an inner thread meshing with the thread 7 8on the shaft 6. Another ball bearing 79 is disposed beyond the collar 77and the stop 76, the ball bearing 79 pressing the stop 76 against theshoulder 8O in 110 the casing 5 and being held in position by the cellar81 which is engaged by the plug 82 which closes the outer end of thecasing around the shaft 6. A bearing 83 of the shaft 6 is held inposition by a collar 84 dis- 115 posed around the shaft 6 and having athread 85 meshing with a thread 86 in the plug 82.

The stop 76 limits the outward movement of the ball bearing 74; thecollar 77 which 120 is secured to the shaft 6 serving to push the saidball bearing 74 inward against the influence of the spring 71 when thetool is in use. The collar 87 is provided to prevent foreign substancesfrom entering the casing 125 5 and also serves as a stop to limit theoutward movement of the shaft 6.

A lubricant is supplied to the casing inember 5 and this lubricant isfed through the opening 88 to the casing 5; the lubricant 130 i thenflows around the ball bearing 64 of one of the adjacent through theopening 89 `in the flange`69 to the ball bearing 74. The lubricant thenflows between the collar 7 Tand the stop 76 to the ball bearing 79, `andwhen the shaft 6 is moved inwardly the collar 87 is raised to permit thelubricant to flow to the bearing 83, and on the return movement of theshaft 6 lubricant is forced through the bearing 83 to keep the saidbearing clean.

In using the device the operatorv grasps the handle 34 and whenthe shaft6 1s rotated and the plate 7 rotates therewith, the o eratorbrings theteeth 15 against the surface of the stone which is to be treated, andwith the rotation of the plate 7 with the shaft 6, which is yieldinglyextended, the teeth l5 will strike the surface of the stone repeatedlyto treat the stone in the manner desired. Any desired number of spindlesand disks may be employed.

When the casing member 5a is turned home the nut 51 is turned to movethe terminal of the screw 50a into the orifice 52vin the casing member5a, the screw 'being| also disposed in the orifice 53 in the arm 33.

As will be seen by referring to Fig. 6, the ends 15a of the teeth 15vare preferably spaced equal distances from a. radius 15b which isparallel to the neighboring side l5c teeth. t

The teethy are yconstructed in this manner as it has been found thattheygive lthe longest and most elicient service.

' The direction of the bodily movement of the rotary cutters over thesurface to be treated is indicated by the arrow above the cutterl inFig. 6 of the drawings, and the rotation of the cutters as they arerolled over the surface, `is indicated by to be treated is shown at l5Xin Fig. 6, and it will be noted that the point of this tooth, whichfirst engages the surface, is formed by the intersection of the side15ey with the end 15a. f

In order to prevent the action of the outters as ythey are rolled overthe surface to be treated from partaking too much of the nature of therolling of a. polygonal body, the washers l0b are provided, thesewashers also cooperating in the cutting and surfacing operations of thetool. The washers 10b, by cutting grooves in the surface to be treatedadjacent to which the chiseling or chipping action of the teeth of thecutters takes place, facilitate this chiseling or chipping action andthe removal of the material produced by such action.

It will be noted that washers 10b which are substantially flush with theperipheries of the cutters, are located outside the outermost series ofcutters, whereby they not only v guide and coperate with the cutters inthe by rolling engagement with th the cutter in one stantly pressingsaid cutting operation, but are so located that they remove inequalitiesin the work of the tool as the tool is moved over the surface to betreated, these washers being the last parts of the cutting elements ofthe tool to pass over the surface.

Having thus described my invention, I claim as new and'desire to secureby Letters Patent:

l. In a tool of the class described, arotary toothed cutter supported tobe rotated by rolling engagement withy the surface to bey treated, saidcutter' edge of each tooth leading in the direction of rotation of saidcutter and having the leading face of each tooth receding, with respectto said direction of rotation, from the radius to the cutting edge, andmeans for rolling` said cutter bodily over the surface to the treated. i

2. vIn a toollof the class described, a rota toothed cutter supported tobe rotated by rolling engagement with the surface to be treated, saidcutter having the cutting edge of' each tooth leading in the directionof rotation of said cutter and having the leading face of each toothreceding, with respect to said direction of rotation, from the radius tothe cutting edge, means for rolling said cutterbodily over the surfaceto be treated, means for yieldingly holding said cutter in engagementwith the surface to be treated.

3. In a tool of the class described, a rotary toothed cutter supportedfor rotation by rolling engagement with the surface to be treated, saidcutter having the body of each tooth receding, with respect to thedirection of rotation of the cutter, from the radius to the cuttingedge, and a carriery automatically rollingsaid cutter bodily in a closedpath while maintaining the axis of thecutter in one plane.

4. Ina tool of the class described, a rotary toothed cutter supportedfor rotation e surface to be treated, said cutter having the body ofeach tooth receding, with respect to the directionof rotation of thecutter, from the radius yto the cutting edge, a carrier automaticallyrolling said cutter bodily in a closed path while maintaining the aXisof plane, and a resilient mount for said carrier pressing said carrieroutward transversely to said plane.

5. In a tool of the class described, a rotary toothed cutter supportedfor rotation by rolling engagement with the surface to be treated, saidcutter having the body of each tooth receding, with respect to thedirection of rotation of the cutter, from the radius to the cuttingedge, means .for concutter into engagement with the surface to betreated, and means for repeatedly rolling said cutter bodily over saidsurface in the direction to effect the aforementioned rotation of saidcutter.

G. In a tool of the class described, a rotary toothed cutter supportedto be rotated by rolling engagement with the surface to be treated, saidcutterl having the cutting edge of each tooth leading in the directionof rotation of said cutter and having the leading face of each toothreceding, with respect to said direction of rotation, from the radius tothe cutting edge, and means for repeatedly rolling said cutter bodilyover the -surface to be treated in' the direction to effect theaforementioned rotation of said f cutter.

i radius to the cutting 7. 1n a tool of the class described, a series ofrotary toothed cutters supported to be otated by rolling engagementr i'ith the surface to be treated, and each having the cut ting edges ofits teeth leading in the direction of rotation of the cutter and havingthe leading face of each tooth receding, with re'- spect to saiddirection of rotation, from the edge, and means for repeatedly rollingsaid cutters bodily in succession over the surface to be treated in thedirection to effect the aforementioned rotation of said cutter.

8. In a tool of the class described, a rotary toothed cutter supportedto be rotated by rolling engagenfientv with the surface to be treated,said cutter having the cutting edge of each tooth leading in thedirection of rotation of said cutter and having the leading face of eachtooth receding, with respect to said direction of rotation, from theradius to the cutting edge, means for rolling said cutter bodily overthe surface to be treated in order to roll said teeth successively intochiseling or chipping engagement With said surface, and means adjacentto and movable With said cutter and having a cutting peripherysubstantially flush With the periph-l ery of said cutter for deniiigthe'area of the chiseling or chipping action of said cutter.

9. In a tool of the class described, a rotary toothed cutter supportedto be rotated by rolling engagement With the surface to be treated, saidcutter having the cutting edge of each tooth leading in the direction ofrotation of said cutter and having the leading face of each toothreceding, with respect to said direction of rotation, from the radius tothe cutting edge, means for rolling said cutter bodily `over the surfaceto be treated, and a rotary disk adjacent to and movable with saidcutter, and having a cutting periphery substantially flush with theperiphery of said cutter.

l0. ln a tool of the class described, a series of rotary toothed cutterssupported to be rotated by rolling engagement with the surface to betreated, and each having the cutting edges of its teeth leading in thedivbeing rotatable about said center rection of rotation of thecutterand having the leading face of each tooth receding, With respect to saiddirection of rotation, from the radius to the cutting edge, and acarrier for rolling said cutters bodily in succession over the surfaceto be treated, said carrier being constructed to maintain the axes ofsaid cutters substantially in one plane.

il. ln a tool of the class described, a series of rotary toothed cutterssupported to be rotated by rolling engagement with the surface to betreated, and each having the cutting edges of its teeth leading in thedirection of rotation of the cutter and having the leading face of eachtooth receding, with respect to said direction of rotation, from theradius to the cutting edge, and a carrier in which said cutters aremounted with their axes radially arranged substantially in one planeabout a common center, said carrier to roll said cutters bodily iiisuccession over the surface to be treated.

1Q. ln a tool of the class described, a series of rotary toothed cutterssupported to be rotated by rolling engagement with the surface to betreated, and each having the cutting edges of its teeth leading in thedirection of rotation of the cutter and having the leading face of eachtooth receding, with respect to said the radius to the cutting edge, avcarrier in which said cutters are mounted with their axes radiallyarranged substantially in one plane about a common center, said carrierbeing rotatable about said center to roll said cutters bodily insuccession over the surface to be treated, a support for said carrierhaving surface-engaging stops, means for yieldingly pressing saidcarrier outward in its support, and means for limiting the outwardmovement of said carrier With respect to said stops.

13. ln a tool of the class described, a i'otatably mounted plate havinga bearing disposed substantially radially and a rotary toothed cutterjournaled in said bearing, said cutter having its teeth each provided'with an end face substantially normal to the radius of the cutter andWith a leading face disposed at an acute angle to said end face, and arotary disk adjacent to and movable with said cutter and having acutting periphery substantially flush with the periphery of said cutter.

la. ln a tool of the class described, a rotatably mounted plate having abearing disposed substantially radially and a rotary toothed cutterournaled in said bearing, said cutter having its teeth each providedWith an end face substantially normal to the radius of the cutter andivith a leading face disposed at an acute angle to said end face, arotary disk adjacent to and movable with said cutter and having acutting periphery direction of rotation, from substantially Hush Withthe periphery` of said cutter, and a resilient mount for said platepressing said plate outvvard transversely to its plane of rotation. f

15. In a tool of the class described, a ro'- tatably mounted-platehaving a radial bearing, a spindle mounted in the bearing, a diskmounted on the spindle and having teeth eX- tending from its peripheryat an angle to the radius of the disk, and a Washer mounted on thespindle and extending substantially to the outer ends of the teeth onthe disk for limiting the depth of the cut made by the teeth and forremoving inequalities in the cut of the teeth.

16. In a tool of the class described, a casing having an inner thread, abearing having a shoulder and an outer thread meshing With the innerthread, a bearing disposed against the shoulder7 a shaft journaled inthe last mentioned bearing, a kWorm journald in the casing, teeth on thefirst bearing Wit i ing in which the shaft is journaled, a collarsecured to the shaft With Which the last mentioned bearing engages, andresilient means for holding the second and third bearings yieldinglyavvay from each other.

17. `In a tool of the class described, a casing, a bearing in thecasing, means to limit the movement of the bearing in one direction,relatively to the casing, a shaft journaled in the bearing, a collarsecured to the shaft and disposed Within and spaced from the means toprovide a lubricant opening, the collar being normally disposed againstthe bearing, another collar for holding the bearing against movement inthe other direction, a plug for closing the end of the casing andhaving' an opening through' which the shaft is disposed, the plug beingdisposed against the last collar, a collar on the shaft and nor- Whichthe Worm meshes, another bearnally disposed against the inner side ofthe p ug.

18. In a tool of the class described, a plate having an opening and abearing groove leading thereto, a spindle disposed in the groove, asurface on the spindle, there being a recess in the spindle and a secondplate having-an opening, through Which the surface treating memberextends, the second mentioned plate being provided with a flangeengaging the spindle at its recess.

19. Ina tool of the class described, a plate having an opening and abearing groove leading thereto, a spindle disposed in the groove, asurface treating member mounted on the spindle, a second plate having anopening, through which the surface treating member extends, a threadedshaft on which the rst plate is mounted, and a nut mesh'- ing With thethread on the shaft and engaging the plate, the spindle engaging the nutto prevent its rotation relatively to the shaft.

20. In a tool of the class described, a rotary cutter carrier, alongitudinally movable spindle on Which said carrier is mounted, a shaftfor4 driving said spindle, coperating means on said shaft and saidspindle for connecting said shaft and said spindle either for coaxialdriving or for right angular-driving, and interchangeable means forcovering one pointu of connection when the other is being utilized.

In testimony whereof I have signed my name to this specification in thepresence of the two subscribing Witnesses.

JOHN O. BERG.

Witnesses EVERARD B.

MARSHALL, GEORGE H.

EMsLm.

Copies of this patentmay be obtained for five cents each, by addressingthe "Commissioner of Patents,

Washington, I). C.

treating member mounted WHEREAS the patentee has returned the LettersPatent No. 1,223,359, granted on application renewal No. 101,645, andrequested that a neviT patent be issued, on

thevground that Certain matter has been omitted before line 35 of page 3and after line 47, same page, and

WHEREAS it appears from the ofiioial record of the oase that the patentWas improperly issued, it is HEREBY ORDERED that the instrumentpurporting to be Patent No. 1,223,359 be, and the same is, herebyWithdrawn.

It is FURTHER ORDERED that the seal be broken, the ldocument markedwithdrawn and returned to the file, and that a patent Conforming to thecorrecty record of the application be issued forthwith.

May 24, 1917. l n. F. WHITEHEAD,

First Assistant Commissioner.

